T-Mobile’s new app for Windows phones arrives in the Store

T-Mobile USA has finally provided some much-needed support to its Windows phone line in form of a new app update to its existing Store app. The app which replaces the older T-Mobile store app which allowed you to do easy bill payments and data checking, It doesn’t add much, aside from a new design and reportedly improved diagnostics support, but its an improvement to the aging T-Mobile app that languished in the store.